A dream of Red Mansions is one of the four masterpieces of Chinese classical literature

A dream of Red Mansions is one of the four masterpieces of Chinese classical literature

Classical literature can be removed
Good luck!

A dream of Red Mansions is one of the four masterpieces of Chinese classical literature

Remove "classical literature"

I love reading "journey to the west", "China Youth Daily", "Andersen's fairy tales" and "children's Literature" and other extracurricular books
You have to fix it to the right person

I love reading Journey to the west, Andersen's fairy tales and children's literature

Car a and car B leave from a and B. It is known that car a travels 75KM per hour and car B 84km per hour. The two cars meet 18km away from the midpoint. How many kilometers do car a and car B travel?

Meeting time: 18 × 2 ^ (84-75) = 36 ^ (84-75) = 36 ^ (9) = 4 (hours) car line a: 75 × 4 = 300 (km) car line B: 84 × 4 = 336 (km) a: car line a is 300 km, car line B is 336 km

In the triangle ABC, ab = AC, if the angle B = 45 ° and BC = 2, then AB = AC=_____ ?
Sure enough, I still can't. how can I work it out~

AB = AC, so it is isosceles triangle, angle B = angle c = 45 degrees, so angle a = 90 is straight triangle, ab = BC * cos45 = 2 * radical 2 / 2 = radical 2

The whole journey from place a to place B is 48km. Xiaohong takes 8 / 5 of the whole journey at 1:15 by bike. How many hours does it take to complete the whole journey?

2 hours

If the median of a set of data 3,4,4, X is equal to the mean, the value of X is

When (3 + 4 + 4 + x) / 4 = 3.5, 14-3-4-4 = 3 holds
When (3 + 4 + 4 + x) / 4 = 4, 16-4-4-3 = 5 holds
So the answer is three and five

Party A and Party B set out from ab at the same time and walk in opposite directions. Party A travels 8 kilometers per hour. Party B travels 6 kilometers per hour and meets at 3 kilometers from the midpoint of ab
Time to meet

Let two people meet in X hours
(8-6)×x=3×2
2x=6
x=3

1/(a+1)+2/(1+a^2)+4/(1+a^4)+8/(1+a^8)+16/(1+a^16)-32/(1-a^32)
RT

1/(a+1)+2/(1+a^2)+4/(1+a^4)+8/(1+a^8)+16/(1+a^16)-32/(1-a^32)=1/(a+1)+2/(1+a^2)+4/(1+a^4)+8/(1+a^8)+16/(1+a^16)-32/(1-a^32) -1/(a-1)+1/(a-1)=-2/(a^2-1)+2/(1+a^2)+4/(1+a^4)+8/(1+a^8)+16/(1+a^16)-32/(1-...

On a map with a scale of 1:200000, the distance between a and B is 2.5cm. If you draw on a map with a scale of 1:250000, the distance between a and B is a few percent
Please scale it

On the map, the distance between a and B is x cm
250000：2.5=200000：X
250000X=200000×2.5
250000X=500000
X=500000÷250000
X=2
A: on a 1:250000 scale map, a and B are 2 cm apart